[HN Gopher] Best Raspberry Pi Projects
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Best Raspberry Pi Projects
Author : Zaplanincan
Score : 209 points
Date : 2022-05-03 09:29 UTC (1 days ago)
(HTM) web link (www.tomshardware.com)
(TXT) w3m dump (www.tomshardware.com)
| philjohn wrote:
| See also RaspAP - turns your raspberry pi into a wireless access
| point.
|
| I have one setup in a Raspberry Pi 400 for when I travel - it's
| configured as a wireguard peer back to inside my home network so
| any devices I connect to it are being routed securely to there
| before out to the internet (and I can also access my network from
| the road, including backups and media).
| phkahler wrote:
| Where can I get a Pi these days. I have a work project (low
| volume need about 5 Pi) where I replaced a Matrix Orbital LED
| display and custom membrane keypad with a Pi and touchscreen. I
| used my own personal Pi model B but I need a few for the company
| and they are out of stock everywhere. (displays are not a
| problem, just the Pi itself)
| dividuum wrote:
| It's difficult. You can try your luck with
| https://rpilocator.com/
| misnome wrote:
| FWIW I found better luck looking for "Starter kits" that are
| the board + power supply + case etc. There were a couple of
| sites that rpilocator checked that didn't have stock listed,
| but did have 8gb 4bs as part of a "Starter kit" for ~PS15
| more.
|
| I assume it's some agreement not to list all the variants to
| try to allow hobbyists to still get some.
| vbezhenar wrote:
| I bought Pi Zero 2 on aliexpress few weeks ago. Can't say
| whether it's genuine as it's not arrived yet. But I did not
| find it anywhere else.
| ajsnigrutin wrote:
| I need a couple for a project, and yeah... good luck.
|
| RPI400 is available pretty much everywhere, but rpi3, 4 or
| zeroW like they never existed.
| sprash wrote:
| Many typical Raspberry pi IOT projects can be done with
| ESP32/ESP8266 based boards which are highly available and very
| cheap.
| Freaken wrote:
| Depends on where you live, but here in Canada, PiShop
| (https://pishop.ca) usually has 4B kits in stock. I haven't
| seen single boards being available for a long time though.
| phkahler wrote:
| Any kits with the 7" touch screen? I need some of those
| anyway.
| antongribok wrote:
| I actually bought an PRi 4 8GB 2 weeks ago at my local
| MicroCenter, so they're definitely making (and selling) them.
|
| I decided to check on my phone on a whim. They showed 8 in
| stock. By the time I got there, 30 minutes later, they had 3
| left.
|
| That PiLocator site does show the last time they've been in
| stock, and from my non-scientific assessment, it looks like
| availability is slightly getting better.
| baby-yoda wrote:
| with the explosion in popularity of the pi in both home and
| commercial use I wonder if it makes sense for the pi foundation
| to shift more towards the compute module style and let the market
| handle the io/specialization aspect? id assume the CM4 would be
| less constrained by shortages since theres a simpler BOM?
| croutonwagon wrote:
| One of the recent ones I did was a Pi-KVM.
|
| https://imgur.com/a/AVxuR0d
|
| Im honestly considering deploying these at work to replace some
| aging (and expensive) dell, java based ipkvms. I like it enough i
| made a second one to attach to a small headless desktop. Mainly
| just as a cheap quasi-OOB management.
|
| Mine use h.264/webrtc or html5/mjpeg and on one i even hooked it
| up to a smaller kvm to give me a 4 port switcher via the webUI.
| Pretty slick and all told was under $400 for a 4-port model. A
| single pikvm, including the case and everything was about 100
| bucks.
|
| With some systems (ie: supermicro) and a ribbon cable, you could
| rig up ATX controls as well.
| marcosdumay wrote:
| On the subject of IP-KVMs, I miss1 something that I can plug on
| the USB of several computers, and access them by the bare
| serial interface, without messing with video capture and
| peripheral emulation. It would be something much simpler than
| the things available today, even requiring less wires.
|
| The main issue I see with it is that it would need to connect
| to multiple host USBs and only one client.
|
| 1 - I actually don't miss it anymore because I'm not in a
| situation to use it, but I used to miss it.
| croutonwagon wrote:
| Not sure i follow.
|
| In this case. Its basically a single USB cable and a
| HDMI/Video cable.
|
| All the Mouse/Keyboard etc is emulated through USB. Which is
| pretty nice. That was the best part for me. And with modern
| standards the lag was noticeable, but minimal. That said, in
| my cases, im just using SSH or something anyway. This was
| more for outage situations, or in a situation where i need to
| make a BIOS change remotely etc.
| marcosdumay wrote:
| Oh, you have 1 of those for each server, like a normal IP-
| KVM. So there's a network, a video and a USB cable for each
| server, plus the server cables.
|
| It should be able to build a device where you use an extra
| USB for each server plus one network cable for each 4, 8,
| whatever (if you push it, your entire hack).
|
| To use it, you would SSH into the pi, and use a command to
| get a server.
|
| The serial interface is quite old, everything tends to be
| accessible there. But now that you mentioned, I'm not sure
| you can update the BIOS with it.
| croutonwagon wrote:
| So you can do that if you want, you would probably need
| some USB hubs to accomplish, and probably a logical way
| to map out your serial connections, but it should be
| doable.
|
| https://docs.pikvm.org/usb_serial/
|
| Or in the case of how I did it, i setup a multi-port KVM,
| that allowed me to manage x number of devices (with
| video) from a single unit. In this instance, a serial
| connection was used from the pi to the actual KVM which
| allowed me to switch inputs etc, from the gui.
|
| https://docs.pikvm.org/multiport/
|
| https://docs.pikvm.org/ezcoo/
|
| https://docs.pikvm.org/multiport/
| sparker72678 wrote:
| Many cool ones in this list! Other great ones: -
| https://birdnetpi.com -- Bird call logging -
| https://flightaware.com/adsb/piaware/ -- ADS-B Tracking -
| https://pi-hole.net -- Network wide ad blocking -
| https://homebridge.io -- HomeKit bridge for many devices/services
| reaperducer wrote:
| _https://birdnetpi.com -- Bird call logging_
|
| I love this idea. I've just started getting into birds, and I
| wish I had steady enough hands to build a solar+battery version
| of this I could stash in the woods for a week.
| jmherbst wrote:
| I've set this up recently with a cheap(~$20) USB microphone
| and just have it running on the back porch and it's been such
| a delight. Loving it!
| greenburger wrote:
| You might be interested in picking up an AudioMoth [0]. A bit
| more work as you'd have to manually push through BirdNET, but
| easier to deploy.
|
| https://www.openacousticdevices.info/audiomoth
| geoffeg wrote:
| Along the lines of piaware, also checkout https://liveatc.net.
| If you live near an airport that's not currently served by the
| site you can set one up moderately easy.
| loginatnine wrote:
| No blog post or pictures but I have taped an
| ADXL345(accelerometer) on the back of my washing + dryer and I'm
| using a pi to notify me when a load is done.
|
| Didn't have the time to put a fancy algorithm to detect movement
| so it's rough, but it has been working perfectly for the past 4
| years with no false positive/negative.
|
| https://github.com/jebeaudet/time-to-fold-alerter
| alar44 wrote:
| Why not detect current in the power cable? Or tap into an
| indicator light or relay? Way easier.
| loginatnine wrote:
| Absolutely, however I already had the accelerometer in hand
| for another project.
| gspr wrote:
| I'll hijack this thread to ask: What are some good Pi
| alternatives that _don 't_ need blobs to boot and run, and that
| use mainline (or more-or-less mainline) kernels?
|
| I don't need any video output, and I'm happy to pay double. What
| are my options?
| auxym wrote:
| Pine64 maybe?
|
| https://wiki.gentoo.org/wiki/PINE64_ROCKPro64
| gspr wrote:
| Thanks! That's exactly the kind of advice I was looking for!
| fsagx wrote:
| If you just need a tiny, fanless board that runs linux, like-
| new Wyse3040 can be had in any quantity you like for ~$30 - $40
| (ethernet only, though). Wyse5010 is a bit bigger and more
| capable (and has built-in wifi) around the same price.
| jpetrucc wrote:
| Where are you seeing these for those prices? ebay? It'd be
| interesting to see what could be done with boards like this
| fsagx wrote:
| yes. I've picked up a few on ebay:
|
| https://www.ebay.com/sch/i.html?_nkw=wyse+3040
|
| Many listings will not include the power supply, but if you
| have a drawer full of wall warts, you can probably find
| something that works.
| thecolorblue wrote:
| Can you explain a little more? I don't know what you mean by
| 'blobs to boot and run'. As far as I know, the latest Linux
| kernel supports the raspberry pi.
| flyinghamster wrote:
| The Pi actually boots from the GPU, which runs a closed-
| source binary blob. The GPU then starts up the ARM cores, and
| that's where Linux boots.
| hoppyhoppy2 wrote:
| The FSF has a page on single-board computers that might be
| helpful, at least to narrow down your options by discarding the
| worse options. https://www.fsf.org/resources/hw/single-board-
| computers
|
| > _Some have workarounds, but some are fatally flawed and none
| are fully free._
| ohbeishah9Ienus wrote:
| http://www.orangepi.org/ ?
| https://ameridroid.com/collections/single-board-computer ?
| gspr wrote:
| Those look like good sources for a variety of SBCs. Thanks!
| But how do I narrow the selection down to my criteria?
| varispeed wrote:
| I wish I could find a project that would recognise a cat by its
| appearance and open / close a cat flap based on that. It could
| also make a noise or other distraction at cats that are
| recognised to deter them from tampering with the cat flap. The
| cat flaps available on the market use a chip to identify a cat,
| but this is a terrible method - it doesn't work more often than
| it does. Many times my cat was attacked by other cats because it
| couldn't get in and now it is scared of cat flaps.
| nbernard wrote:
| Maybe this could be a starting point:
| https://joakimsoderberg.github.io/catcierge/ ?
| lenwood wrote:
| Have a look at Lobe [0]. I haven't found a use case for it
| personally but it looks promising. The caveat is that this
| would only handle cat identification, you would need to build &
| implement the opening mechanism.
|
| [0] https://www.lobe.ai/
| AuryGlenz wrote:
| Maybe things have changed, but when I was looking for doggy
| doors I was dismayed nobody made one that would automatically
| open in case of a fire.
| brimble wrote:
| I'm no expert, but I can imagine that automatically opening
| an air vent to the outdoors, when a fire is detected, isn't a
| great idea.
| MarcScott wrote:
| Use a Pi with a camera module and a passive infrared motion
| sensor. Take a bunch of photos of your cat and other cats,
| using the module and the PIR to trigger it. Manually label
| photos as `your cat` and `not your cat` and then use
| https://teachablemachine.withgoogle.com/ to retrain a model
| based on your cat's image. Then rig a big enough servo or
| stepper motor to open a cat door, and a big buzzer for other
| cats.
| sgt wrote:
| Also looking for something similar. Our cat never comes indoors
| and therefore has a food bowl on our porch. Several other cats
| eat her cat food every day and it feels like we are feeding
| half a dozen mouths, including birds.
| arch_rust wrote:
| And an in-car ADS-B system: https://rsadsb.github.io/rasp-pi-
| display.html
| rane wrote:
| What would make the best platform for building some kind of
| personal dashboard/radiator on an e-ink screen?
|
| I guess ideally I'd spend as little time as possible on tinkering
| with low-level rendering code.
| andruby wrote:
| I bought an inky 7 colour e-ink screen for rpi [0]. Pimoroni
| offers a python library that can write any image (jpg, png) to
| the screen.
|
| Any rpi just fits with the gpio pins like a typically HAT. I'm
| using an rpi zero 2 w. Setup was less than 5 minutes.
|
| I'm now hooking up a system that will take screenshots from a
| home assistant dashboard and push that to the display every 5
| minutes.
|
| [0] https://shop.pimoroni.com/products/inky-
| impression-5-7?varia...
| [deleted]
| flyinghamster wrote:
| If you want to monitor things around you, and you have an SDR
| dongle set up, rtl_433 is handy. I have a Pi 3 running it to
| graph temperature and humidity readings from a couple of remote-
| reading sensors, plus barometric pressure from a Sense Hat and
| voltage, load, and battery readings from my UPS. It will display
| selected readings on the LED display, but I mostly just let
| mrtg/rrdtool do its thing.
|
| https://github.com/merbanan/rtl_433
| hdjjhhvvhga wrote:
| My first thought was, "Why would I need SDR to read
| temperature/humidity from sensors", then I realized these are
| more like wireless weather stations.
|
| Out of curiosity: why did you decide to purchase ready
| solutions instead of rolling your own using ESP32 for a
| fraction of the price?
| margalabargala wrote:
| Not the person you replied to, but someone who did the same
| thing:
|
| Most of the things inside my house are ESP32 or zigbee things
| I put together myself. Things that go outdoors, though, I'm
| much more likely to purchase an off-the-shelf solution for
| longevity's sake. Especially if the whole point of the item
| is to be rained/snowed on, be left in direct sunlight, and so
| forth.
| sgt wrote:
| You can always build a tiny little house for your outside
| ESP and leave it outside.
| gh02t wrote:
| These devices actually end up being kind of hard to engineer,
| measuring air temperature accurately especially can be kind
| of tricky. And then add in that for a weather station it has
| to be resistant to the elements and low power. Speaking from
| experience, you end up spending more money and a lot more
| work going the DIY route except maybe at the high end. You
| can get an Acurite temp/humidity/lightning sensor that is
| fine outdoors and batteries last for ages for like $25.
|
| Not that there isn't value to rolling your own, just I
| wouldn't assume it's as cheap and easy as you might
| originally.
| flyinghamster wrote:
| > why did you decide to purchase ready solutions instead of
| rolling your own using ESP32 for a fraction of the price?
|
| I already had the sensors long before I had the SDR; they're
| paired with display units as well.
| simcop2387 wrote:
| It's not likely going to be cheaper to roll your own once you
| add a case and weather proofing and battery handling. These
| things can be had for as cheap as $15 on amazon,
| https://www.amazon.com/Crosse-Technology-308-1409WT-
| CBP-308-... or even down to $5 on aliexpress,
| https://www.aliexpress.com/item/1005003408554165.html
|
| Along with that using 433MHz means that there's a much longer
| range, and they generally also have much lower power usage
| compared to doing wifi, which makes the batteries last a lot
| longer.
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